X axis not working

if you see nuts on the threaded rods below the extruder assembly then you have done what they call throwing your nuts and it simply means the bed made contact with the bed and the rods continued to spin and the nuts lowered. YOu need to manually lift the extruder assembly along with the x axis up about 2 inches and manually turn the nuts so they go up about an inche higher than they are right now lower the assembly back down and make sure the nuts disappear inside the x axis chassis on both side you may have to wiggle the rods around to get it to drop into place then go through the whole leveling process again with the business card.